September
| Sep. '03 | OPPONENT | TIME (ET) | TV | LOCATION |
| Mon. 1 | at Chicago Cubs | 2:20 PM | KPLR | Wrigley Field |
| Tue. 2 | at Chicago Cubs | 8:05 PM | FoxM | Wrigley Field |
| Wed. 3 | at Chicago Cubs | 2:20 PM | Wrigley Field | |
| Thu. 4 | at Chicago Cubs | 2:20 PM | KPLR | Wrigley Field |
| Fri. 5 | Cincinnati | 8:10 PM | FoxM | Busch Stadium |
| Sat. 6 | Cincinnati | 8:10 PM | Busch Stadium | |
| Sun. 7 | Cincinnati | 2:10 PM | Busch Stadium | |
| Tue. 9 | Colorado | 8:10 PM | FoxM | Busch Stadium |
| Wed. 10 | Colorado | 8:10 PM | FoxM | Busch Stadium |
| Thu. 11 | Colorado | 1:40 PM | Busch Stadium | |
| Fri. 12 | at Houston | 8:05 PM | FoxM | Minute Maid Park |
| Sat. 13 | at Houston | 7:05 PM | KPLR | Minute Maid Park |
| Sun. 14 | at Houston | 2:05 PM | KPLR | Minute Maid Park |
| Mon. 15 | Milwaukee | 8:10 PM | FoxM | Busch Stadium |
| Tue. 16 | Milwaukee | 8:10 PM | FoxM | Busch Stadium |
| Wed. 17 | Milwaukee | 8:10 PM | FoxM | Busch Stadium |
| Thu. 18 | Milwaukee | 8:10 PM | FoxM | Busch Stadium |
| Fri. 19 | Houston | 8:10 PM | FoxM | Busch Stadium |
| Sat. 20 | Houston | 2:10 PM | Busch Stadium | |
| Sun. 21 | Houston | 2:10 PM | Busch Stadium | |
| Tue. 23 | at Milwaukee | 8:05 PM | FoxM | Miller Park |
| Wed. 24 | at Milwaukee | 8:05 PM | FoxM | Miller Park |
| Fri. 26 | at Arizona | 10:05 PM | FoxM | Bank One Ballpark |
| Sat. 27 | at Arizona | 4:05 PM | KPLR | Bank One Ballpark |
| Sun. 28 | at Arizona | 4:35 PM | KPLR | Bank One Ballpark |
